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Hosted Midterm Exam #1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Question 30 of 30 (5 points) | Attempt 1 of 1 | 36m 14s Remaining 6.MCTQ Section Exercise 20 For samples of the specified size from the population described, find the mean and standard deviation of the sample mean x. The National Weather Service keeps records of rainfall in valleys. Records indicate that in a certain valley, the annual rainfall has a oDo mean of 80 inches and a standard deviation of 12 inches. Suppose the rainfalls are sampled during randomly picked years, and x is the mean amount of rain in these years. For samples of size 36, determine the mean and standard deviation of x. OH = 12; 6, = 80 OH = 80; 0, =2 OH = 2; 0 = 80 OH = 80; 0 = 12

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